UE H100-193 H100 Series Pressure Switch

The UE H100-193, also cataloged as the H100-193 Pressure Switch, operates as a dedicated hardware component for binary pressure threshold detection within industrial fluid and gas process loops. The device provides direct mechanical-to-electrical execution, converting process pressure changes across a metallic diaphragm into discrete contact state changes.

Hardware Specifications

Process Control and DCS Instrument Loop Integration

The electromechanical switch assembly integrates directly into process control systems via standard 4-20 mA HART loop protocol secondary alarm lines or discrete DCS input cards. Internal physical contacts provide localized channel-to-channel isolation to prevent loop interference when switching independent control networks simultaneously. The dual SPDT contact architecture allows for parallel execution of a physical interlock circuit and a digital status indication feedback loop to the host DCS marshaling panel without electrical cross-talk.

Frequently Asked Questions

Q: Does this mechanical pressure switch require external power to operate the SPDT contacts?

A: No. The H100-193 operates via direct mechanical force. The process pressure acts against the internal diaphragm to actuate the SPDT micro-switches at the designated setpoint without requiring external electrical excitation.

Q: How is channel-to-channel isolation verified between the two SPDT switch elements?

A: Channel-to-channel isolation is maintained via structural physical separation of the internal micro-switch terminals. Each SPDT contact set operates as an independent dry contact, preventing voltage conduction between separate signal loops up to the maximum rated insulation boundaries.

Field Installation Guidelines

• NPT Thread Engagement: Apply thread sealant or PTFE tape to the 1/2" NPTF male fitting. Screw the process connection into the pressure port ensuring a minimum of 5 full threads of engagement to meet industrial high-pressure pressure-boundary requirements. Use a wrench on the integrated hex flats only; do not turn the housing.
• Electrical Housing Orientation: Mount the enclosure with the electrical conduit entry pointing downward to prevent moisture condensation and process fluids from migrating into the internal SPDT contact chamber via gravity.
• Wiring Separation Constraints: Run low-voltage DC signaling loops in separate conduit channels from high-voltage AC electrical lines to avoid electromagnetic inductive coupling across the dry contacts.
• Grounding Connection: Terminate the internal green grounding screw to the local plant instrument earth ground network to eliminate static accumulation and ensure physical safety thresholds are maintained.